Multi-criteria Approach for Selection of Green-blue and Grey Infrastructure
This chapter describes a method for selection of urban flood measures, based on a multi-criteria analysis that includes flood risk reduction, cost minimization and enhancement of co-benefits. It aims to assist decision makers in selecting and planning measures, which afterwards can be part of either high level scoping analysis or more complex studies, such as model based assessment. The proposed method is implemented within a tool which operates as a standalone application. The complexity of urban drainage systems, the quantity of available measures, the significant investments needed to implement these strategies, and the uncertainty about future conditions, increase decision-making complexity. The selection of measures to reduce flood risk is based on economic efficiency and suitability for local conditions, focusing mainly on traditional grey infrastructure.